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https://issues.apache.org/jira/browse/HIVE-8462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14173132#comment-14173132
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Laljo John Pullokkaran commented on HIVE-8462:
----------------------------------------------
+1
> CBO duplicates columns
> ----------------------
>
> Key: HIVE-8462
> URL: https://issues.apache.org/jira/browse/HIVE-8462
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Priority: Critical
> Attachments: HIVE-8462.01.patch, HIVE-8462.patch
>
>
> {noformat}
> select *, rank() over(partition by key order by value) as rr from src1
> {noformat}
> Original plan appears to be incorrect:
> {noformat}
> HiveProjectRel(key=[$0], value=[$1], (tok_function rank (tok_windowspec
> (tok_partitioningspec (tok_distributeby (tok_table_or_col key)) (tok_orderby
> (tok_tabsortcolnameasc (tok_table_or_col value))))))=[$5], rr=[$5])
> HiveProjectRel(key=[$0], value=[$1], block__offset__inside__file=[$2],
> input__file__name=[$3], row__id=[$4], (tok_function rank (tok_windowspec
> (tok_partitioningspec (tok_distributeby (tok_table_or_col key)) (tok_orderby
> (tok_tabsortcolnameasc (tok_table_or_col value))))))=[rank() OVER (PARTITION
> BY $0 ORDER BY $1 ROWS BETWEEN 2147483647 FOLLOWING AND 2147483647
> PRECEDING)])
> HiveTableScanRel(table=[[default.src1]])
> {noformat}
> and final AST has {noformat}
> TOK_SELEXPR
> .
> TOK_TABLE_OR_COL
> $hdt$_0
> (tok_function rank (tok_windowspec (tok_partitioningspec
> (tok_distributeby (tok_table_or_col key)) (tok_orderby (tok_tabsortcolnameasc
> (tok_table_or_col value))))))
> (tok_function rank (tok_windowspec (tok_partitioningspec
> (tok_distributeby (tok_table_or_col key)) (tok_orderby (tok_tabsortcolnameasc
> (tok_table_or_col value))))))
> TOK_SELEXPR
> .
> TOK_TABLE_OR_COL
> $hdt$_0
> (tok_function rank (tok_windowspec (tok_partitioningspec
> (tok_distributeby (tok_table_or_col key)) (tok_orderby (tok_tabsortcolnameasc
> (tok_table_or_col value))))))
> rr
> {noformat}
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